Fastening for wheels and cranks.



No. 776,985. PATENTED DEC. 6, 1904. J. v. PUGH.

FASTENING FOR WHEELS AND GRANKS.

, I APPLICATION FILED MAY 9, 1904. 110 MODEL. 6 2 SHEETS-SHEET 1.

M a W cf w V I No. 776,935. PATBN'TED DEC. 6, 1904.

-J.V.PUGH.

FASTENING FOR WHEELS AND GRANK'S.

nrmommn FILED my a, 1904.

no MODEL.

, 2 SHEETS-SHEET 2 Witnessas, v fiwmlon W MW 6% NITED STATES PatentedDecember 6, 190 1.

PATENT OFFICE.

FASTENING FOR WHEELS AND GRANKSu SPECIFICATION forming part of LettersPatent No. 776,935, dated December 6, 1904. Application filed May 9,1904. Serial No. 207,124. (No model.)

To all whom, it may concern.-

Be it known that 1, JOHN VERNON PUou, a subject of the King of (1 reatBritain, residing at Guiting House, Allesley, near Coventry, England,have invented certain new and use ful Improvements in Fastcnings forWheels and Cranks, of which the following is a specilication.

This invention relates to certain new and useful improvements infastenings for wheels and cranks, and aims particularly to improve thestructure described and claimed in Patent No. 738.065, dated September1, 1903.

In order that the present invention may be the better understood, .1remark that the patented invention referred to consists of a memberhavinggrooves, a second member provided with ribs or keys extending intosaid grooves and provided on its outer face with ratchetteeth, a thirdmember provided withinternal ribs or keys also extending into saidgrooves and provided on its inner face with ratchetteeth engaging thoseof the said second n1emher and means for holding the sets ofratchetteeth in engagement.

By the present invention one of the internally-ribbed members is formedvirtually into a carrier of other parts of mechanism, one of which otherparts may have on it the face ratchet-teeth for the COI'I'GSIJODCllDgteeth on the inner face of the other internally-ribbed member to engagewith. In other words, one (or both) of the internally-ribbed members maybe compound-that is, made up of several parts which when the fasteningis complete become so locked together and to the shaft or axle as to bepractically one there with.

Figure 1 of the accompanying drawings represents, in vertical section, acrank and chainwheel fastening for a vclocipede to which my invention isapplied. Fig.- 2 is an end elevation of the same before the crank andfixing screw nut have been passed on to the crankaxle. Figs. 3 to 12,both inclusive, represent parts of the said crank and chain-wheelfastening detached, as is hereinafter explained. Fig. 13 represents,partly in side elevation and partly in vertical section, a modificationof my invention as applied to a crank and chain-wheel fastening; andFig. 14: is an end elevation of the same before the attachment of thecrank and end screw-nut to the crankaxle. Figs. 15 to 19, bothinclusive, represent parts of the crank and chain-wheel fastening, Figs.13 and let, detached.

Referring to the arrangement Figs. 1 to 12, both inclusive, a is thevelocipede crankaxle, (a portion only of which isreprescnted,) having inits end a the series of grooves or flutes, as in the patented fasteninghereinbefore referred to and as seen in the end elevation. Fig. 2. Ontothe grooved or fluted end a of the crank-axle (t the plate 0 of the pairof plates of is passed, the boss or flange a of which plate 1 has aseries of internally-projecting ribs or keys which engage freely(easily) with the notches or flutes in the end a of the axle a. Theplate 0, detached, is represented in vertical section elevation of theouter face and edge view in Figs. 3, i, and 5, respectively. As will beseen from these figures, the periphery of the plate a is angular andcarries a series of equidistant projections a of a triangular figure incross-section. The second or outer platcf of the pair of plates of,which is shown detached in Figs. 7, 8, and 9, differs from the plate cin the respect that it is without a boss or flange, the plain hole inthe said plate f being of a size proper to pass over the boss or flangee of the plate 6. Further, there is formed in the face of the outerplate f a series of face ratchetteeth f (See the sectional view andelevation of outer face, Figs. 7 and 8, respectively.) The triangularprojections f' of the platef, when the latter is applied to the plate 6,alternate with or occupy positions midway between the projections o ofthe plate a.

Before the plate f is applied to the plate a the chain-wheel Z) (theinner or boss portion only of which is shown) is applied to the plate 0.The boss or inner part of the chain-wheel b, detached, is represented invertical section in Fig. 6. The inner edge of the chain-wheel Z) isV-shaped in section, and the sides of the V-shaped edge have such anangle that when the angular edges or peripheries of the plates of aremade to hear thereon they tightly fit the same and rigidly support thechain-wheel b. The V-shaped inner edge of the wheel 6 has in it a seriesof equidistant radial notches, into which the triangular projections ofthe plates cf fit. The making of the equidistant radial notches in thechain-wheel results in the formation of a series of inwardlyprojectingparts 6 which are gripped endwise by the projections f of the plates cf,respectively, when the parts are screwed tightly together. After thechain-wheel?) and plate f have been applied to the plate 0 the crank 0(shown detached in side and end elevation in Figs. 10 and 11,respectively) is fitted on the crank-axle. The boss of the crank c hasinternally-projecting ribs or keys 0 (see Fig. 10,) which freely engagewith the grooves or flutes in the end a of the crankaXle and also faceratchet-teeth 0 on its inner side, the more inclined sides of whichteeth bear on the more inclined sides of the face ratchet-teeth f of theplate f. When the screw-nut (Z, Fig. 12, is screwed onto the screwedterminal a of the crank-axle a, the crank 0 is forced against the outerplate f, and the action of the bearing-faces of the ratchetteeth of thetwo parts on one another tends to turn the compound part 6 bf and crankc in opposite directions on the crank-axle (0. Consequently theinternally-projecting ribs or keys of the plate 6 and crank 0 are madeto bind on opposite sides of the grooves in the end (02 of thecrank-axle with such force as to insure a firm connection of the partsthereon.

The modification of the crank and chainwheel fastening represented inFigs. 13 to 19, both inclusive, have for theirobject to show that thedetails of construction may be varied within considerable limits withoutaffecting or altering the essential feature of the invention. Referringto the arrangement, Figs. 13 to 19, it will be seen that the chainwheel6 may be gripped between and supported by the two plates e f 3 by makingon the presented faces of the two plates ratchetteeth 6* f",respectively. (See the views of the plate 6 detached in Figs. 15 and 16,and

the views of the plate f detached in Figs. 18 and 19.) The inner edge ofthe chainwheel in this arrangement is not V-shaped, the radialprojections formed by the notching of the inner edge of the wheel beingplain, as will be seen by reference to the sectional view of thedetached chain-wheel in Fig. 17 hen the parts are put together, theplain projections of the chain-wheel b are gripped between theratchet-teeth of the two plates 0" f, as will be seen by reference tothe lower half of Fig. 13, where one of the projections of the wheel 5is represented in section and marked 6 and the two ratchet-teeth bywhich the projection b is gripped are marked e f, respectively.

I wish it to be understood that the invention hereinbefore described maybe employed with facility in many other connections than those hereinspecified.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The combination with a member having grooves, of a second and compoundmember consisting of a pair of disk or' washer-like plates one of whichplates has internally-projecting ribs or keys extending into the groovesof the first member the other disk or washerlike plate being internallyplain but having face ratchet-teeth on its outer side, a third memberengaged and carried by the two disks of the second member, a fourthmember with internal ribs also extending into the grooves of the firstmember and having ratchet-teeth engaging those of the outer plate of thesecond member and means for holding the sets of ratchet-teeth inengagement.

in testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOHN VERNON PUGH.

Vitnesses:

RICHARD SKERRETT, ARTHUR J POWELL.

